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S. M. TRAPP.

RBGENBRATING PURNAGB.

No. 523,088. y Patented July 17, 1894.

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'40 terial and absorb Sufficient heat, additional o after the manner of my invention. Fig. '2 is NITED STATES PATENT OFFICE.

SAMUEL M. TRAPP, OE CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE DoNAU-TRAPP CLIMAX CAS PRODUCER COMPANY,

OF SAME PLACE.

REGENERATINe-F-URNACE.

SPECIFICATION forming part of Letters Patent No. 523,088, dated July 17, 1894.

Application filed March 9,1894.

To all whom t may concern:

Be it known that I, SAMUEL M. TRAPP, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illi-l 5 nois, have invented a certain new and use# ful Improvement in Regenerating-Furnaces, (Gase No. 1,) of which the following is a full, clear, concise, and exact description, reference being had tothe accompanying drawxo ings, forming a part of this specification.

My invention relates to regenerating furnaces, and its object is to readily and economically manufacture for regenerating furnaces gas from steam and oil, and in a manner to 1'5 utilizein the process the heat of heretofore Waste products of combustion.

Heretofore, gas has been produced by passing mixed steam and oil through a highly heated checkerwork of refractory material,

zo sufficient heat being thereby imparted to the mixture to decompose the steam and oil into their constituent elements and cause the same to re-unite to form a iixed gas.

My invention herein contemplates the utilization in this process of ltheheat of heretofore waste gases of combustion from a source of heat supply, as a furnace, by causing suchl heat to assist in the decomposition of the oil and steam. To accomplish this the-steam is 3o passed through a super-heater comprising a tortuous passage located in heat conductive relation to the gases of combustion, the steam thusabsorbing heat from such gases and becoming highly super-heated. The steam, thus' 3 5 super-heated, iS ejected into a mixing chamber Where it comes in Contact and is thoroughly intermingled with the oil. The inter- I mixed oil and gas are passed through the checkerwork of highly heated refractory mato that'abs'orbed by the steam from the Waste gases of combustion, to cause the decomposition of the super-heated'steam and of the oil,

which then combine to forma fixed gas.

My invention will be more readily Vunderstood by reference to the accompanying draw ings, in whichi l j v l Figure. 1 is an. elevational view partially in section of a regenerating furnace equipped Serial No. 503,029. (No model.)

a plan view of the super-heaters and the Steam and oil passages arranged in accordance with my invention. Fig. 3 is an isometric view of the oi'l and steam pipes and the valve and operating mechanism. Fig. 4 is a view of one of the super-heaters, the cover being partially broken away. Fig. 5 is a Sectional view on line 5 5, Fig. 2. Fig. 6 is a longitudinal sectional view of the super-heater Online 6--6, Fig. 2.l

Like letters refer to like parts in the several figures. l i f I have illustrated my invention as applied to thewell known Siemens type of regenerative furnace, it being understood that it may be applied to any form of furnace, or in any place Where Waste gases of combustion are available.

The Siemens furnace as usually constructed comprises a hearth a which contains the molten 7o metal to which the heat is to be applied. Gas, from a gas reservoir, or generating furnace,

vis conveyed by the flue b through a checkerwork of refractory material b', which` serves to super-heat the gas, the gas then Vpassing through Outlet b2 where it comes in Contact with air issuing from the outlet c2, the air having been admitted'through the flue c and heated in passing through the highly heated refractory material C. rlhe gas beingi'gnited combines combustively with the oxygen of the air to producea high heat within the hearth. The products of combustion pass through the outlets 6712.62, a part through each and come in contact with the refractory material d e', which they heat in passing therethrough, the products of combustion then passinginto the iiues d and e, and vthen out the Smoke staclV with' which said flues are in communication.' Thus'the `only portion of the waste gases of combustion utilized is that necessaryto heat the refractory material, the remainder pass ing up the smoke stackand escaping unfutilized. A run having continued thus twenty to thirty minutes, the gas supply is cut off o from flue b, said flue being new thrown into communication with the smoke stack, as is also the due c, which before has been in communication with the external air. Flues d and e are disconnected from thesmoke stack Ioo and fine d connected with the supply of gas, while liue e is thrown open to the external air. The gas now passes through the checkerwork d and issues from the outlet d2 where it comes in contact and combines combustively with the hot air from outlet e2. The waste gases of combustion pass by outlets b2 and c2 through .the refractory material b c and then out the stack. Thus is heated during each run the refractory material which on the next succeeding run is to super-heat the gas and heat the air, the heat being derived from the waste products of combustion as they pass to the smoke stack. By my invention I am enabled to utilize these waste products ofcombustion in the production of the gas itself, and thus utilize a considerable portion of heat energy that has heretofore been Wasted; and, furthermore, instead of providing an external supply of gas I am enenabled to produce the gas within the furnace,

and directly in proportion as it ma"`y be desired to be used. To accomplish this, I place in the fiues ZJ and CZ super-heaters h 7L comprising steam pipes of considerable length through which the steam may pass before coming in contact with the oil, thus absorbing heat from the waste products of combustion as they pass through the fines.

In order to provide considerable length of pipe Within a small space, and so disposed that the heat may readily iind access thereto, I provide a number of sections of pipe h2 placed parallel and located about a central axis, the ends of the sections being consecutively joined to form a continuous but tortu-V ous passage for the steam. One end of the super-heater h is connected with a steam supply pipef by means of a pipef,while the other end is connected by means of a pipe f2 with a pipe f". Likewise the super-heater 7L located in the opposite line is connected by pipes f4 and f with the pipes f and f8 respectively.

Located Within the su per-heaters are hollow cylinders or mixing chambers i Qintothe ends of which extend respectively the pipes 7c Zt which are connected with the central steam pipe f3.

Opposite the ends of the pipes 7c 7c are located respectively the ends of the oil pipes Z Z which are in communication with an oil supply pipe Z2 connected with an oil reservoir.

The ends of the oil pipes Z Z are made oblique, as shown more clearly in Fig. 6, and the steam jet directed against the longer sideof the pipe thus creating a suction which causes the oil to flow from the pipe in a steady stream.

In the steam pipes 7c 7a', as well as in the oil pipes Z Z', are placed valves m m m2, ma, by means of which the passage of the steam or oil through the respective pipes may be restricted or prevented.

As it is desired to make gas in but one flue at a time, and, consequently, it is necessary to cause a flow of the steam and oil only on one side, the valve stems may be connected with a rocking arm n so that when the arm 1s in one position the valves m and m are closed, while the valves m2 and m3 are open, and vice versa.

The operation is as follows: Suppose flues CZ and e open to the stack, flue b closed so that no air can enter, and flue c open to the atmosphere. Steam from any suitable source of supplyis admitted through the pipe fand passes by pipes f and f4 through the superheaters h and h', absorbingheat and becoming super-heated. The steam then passes by pipes f2 and f5 to the central pipef. As gas is to be made in the right hand side of the furnace the valves m2 and 'mare opened and the valves m and m closed. The steam from the two super-heaters thus inds passage to the pipe 7c and thence to the hollowcylinder i, Where it comes in contact and is mingled with oil issuing from pipe Z. The intermln gled oil and super-heated steam pass upward where they come in contact with the highly heated refractory material b and are decomposed into their respective elements and caused to reunite to forma xed gas, which, passing out the outlet b2, comes in contact and combines combustively with the heated air issuing from outlet c2. The products of combustion pass through the outlets d2 e2 and in their passage to the smoke stack heat the refractory material cZ e', and also come 1n contact with super-heater h. During this run the heat absorbed by the super-heater h will be such as may remain Within the walls of the iiue ZJ. A run having continued thus for twenty to thirty minutes, the handle 'It is manipulated, thus closing the valves m2 and ma and opening valves m and m', thus causing the liow of steam and oil into thecylindor t" in the iiue d, the moisture passing up Ward through the checkerwork (Z' to form a xed gas which issues from outlet d2 and combines combustively with heated air from outlet e2. The products of combustion pass through outlets b2 c2 and heat the refractory material VZ9' c and the super-heater h.

It `will be observed that duringr each gas run both super-heaters are supplying steam for the manufacture of the gas, one superheater being located in the flue through which the waste products of combustion are passing on their way to the smoke stack, while the other super-heater is in a chamber sealed from the stack and the atmosphere, but which contains considerable heat as the waste pro` ducts of combustion have been just previ ously passing therethrough. In this manner, I am enabled to utilize inthe manufacture of the gas a considerable portion ot' the heat o the waste gases of combustion.

The pipes comprising the super-heater may with advantage be covered with metal to pre sent a smooth surface that may prevent the lodgment of soot between the pipes, and the consequent impairment of their heat conductivity. Furthermore, the central cylinders IOC trg

within which the steam and oil are mixed being located in the line of travel of the waste gases and open at both ends, permits the ready passage therethrough of the waste products, and the carbon that tends to cake upon its inner surface is thus removed.

It is obvious that my invention may be applied to other furnacesvwith the necessary changes to meet the peculiar requirements, the super-heater being placed within the ue, through which the waste products to be utilized may be passing, while the mixing cylinder is placed in any convenient position to direct the mixed steam and oil against a properly constructed checkerwork of refractoryrv material.

It is evident that my invention is susceptilble of modifications, and I do not therefore desire to limit myself to details of construction, but A Having described my invention, what I claim as new, and desire to secure by Letters from each of said chambers, a steam superheater situated in each of said iiues, said superheaters being continuously in communication with a source of steam supply, each of said superheaters being in the form of an open ended hollow cylinder, the axis thereof lying in the line of travel of the escaping gases of combustion, a mixing chamber provided in each of said ilues, said mixing chamber being in the form of a hollow open ended cylinder, the axis thereof lying in the line of travel of the escaping gases of combustion, a steam duct and an oil duct opening into each of said mixing chambers, said steam ducts being adapted to communicate with said superheaters, and valve mechanism for sealing one or the other of said Ilues and opening the steam and oil ducts leading thereto; whereby the passage of the escaping gases of combustion prevents the accumulation of carbon in the mixing chambers, or of soot and ashes on the superheaters, substantially as described. v

In witness whereof I hereunto subscribe my name this th day of March, A. D. 1894.

SAMUEL M. TRAPP. p

Witnesses: v I

ROBERT BARLow, GEORGE L. CRAGG. 

